21020432

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{709}}^1$

素因数の和:843

約数の個数: 40

約数和(自身を含む): 43579800

約数和(自身を除く): 22559368

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 109, 136, 218, 272, 436, 709, 872, 1418, 1744, 1853, 2836, 3706, 5672, 7412, 11344, 12053, 14824, 24106, 29648, 48212, 77281, 96424, 154562, 192848, 309124, 618248, 1236496, 1313777, 2627554, 5255108, 10510216, 21020432]

約数ペア:

[(1, 21020432), (2, 10510216), (4, 5255108), (8, 2627554), (16, 1313777), (17, 1236496), (34, 618248), (68, 309124), (109, 192848), (136, 154562), (218, 96424), (272, 77281), (436, 48212), (709, 29648), (872, 24106), (1418, 14824), (1744, 12053), (1853, 11344), (2836, 7412), (3706, 5672)]